The Weefine ring light gives you 1800 lumens (continuously), or a burst of 3000 lumens triggered by a fiber optic cable. The light can be easily mounted on any 67mm port or adapter. The burn time is around 1 hour at the highest power level. The power comes from one 26650 battery . The battery (26650 lithium) is already supplied in the package and it comes with a small and easy to use charger.